Single Transistor Latch

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For applications requiring high reliability, other more robust latching methods should be considered. Like tunnel diodes or standard flip-flop circuits.
 

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Snapback is the bistable inversion and I expect base storage time is the key delay (much squarer than simple Cj). Latch needs only the snapback and the means to trigger or quench.
 

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That single transistor latch is flaky, since it depends upon the reverse breakdown characteristics of the transistor base-emitter junction, which is not characterized or tested.
 
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